Kafka 最新版kafka_2.12-2.2.1配置

当前基于kafaka最新版 kafka_2.12-2.2.1.tgz 进行配置 。

官网地址： http://kafka.apache.org/intro

kafka的一些基础知识 参考： http://www.hechunbo.com/index.php/archives/140.html

最新版 kafka_2.12-2.2.1.tgz 进行配置 。单机生产者消费者图解配配置，多机模拟配置。以及文件读写配置，经验掌握，集成zookeeper不用再安装

1. 配置 java 环境安装jdk

参考 http://www.hechunbo.com/index.php/archives/132.html

1. 解压kafaka

   [root@localhost hcb]# tar -zxvf kafka_2.12-2.2.1.tgz -C /usr/local

1. 启动zookeeper .因为最新版 已经包含有zookeeper 所以不用另外安装了

   [root@localhost kafka_2.12-2.2.1]# bin/zookeeper-server-start.sh config/zookeeper.properties 
   [2019-06-22 17:47:49,667] INFO Reading configuration from: config/zookeeper.properties (org.apache.zookeeper.server.quorum.QuorumPeerConfig)

2. 重新开一个连接 。输入jps 发现多了一个进程

   [root@localhost ~]# jps
   3136 Jps
   2842 QuorumPeerMain

3. 启动kafka

   [root@localhost kafka_2.12-2.2.1]# ./bin/kafka-server-start.sh config/server.properties 
   [2019-06-22 17:51:18,786] INFO Registered kafka:type=kafka.Log4jController MBean (kafka.utils.Log4jControllerRegistration$)
   [2019-06-22 17:51:20,624] INFO starting (kafka.server.KafkaServer)

4. 再开一个连接 输入jps查看当前运行的进程
   发现多了一个kafka

[root@localhost ~]# jps
3504 Jps
2842 QuorumPeerMain
3147 Kafka

1. 创建一个topic

   [root@localhost kafka_2.12-2.2.1]# bin/kafka-topics.sh --create --bootstrap-server localhost:9092 --replication-factor 1 --partitions 1 --topic test
   [root@localhost kafka_2.12-2.2.1]#

2. 查看topic消息

   [root@localhost kafka_2.12-2.2.1]# bin/kafka-topics.sh --list --bootstrap-server localhost:9092
   test

3. 发送消息 到test

   [root@localhost kafka_2.12-2.2.1]# bin/kafka-console-producer.sh --broker-list localhost:9092 --topic test
   hi,>welcome to to kafka    
   >hi ,how are you

4. 消费者取消息

   [root@localhost kafka_2.12-2.2.1]#  bin/kafka-console-consumer.sh --bootstrap-server localhost:9092 --topic test --from-beginning
   hi,welcome to to kafka
   hi ,how are you

生产者发送消息以后，消费者有通知 ，

![1561197972428](https://raw.githubusercontent.com/hsapphire/picbed/master/1561197972428.png)

1. 进行多台机子测试

   因为我们是单台机子，所以把配置文件复制两份，更改端口和id配置进行第二台，第三台的模拟

   1. [root@localhost ~]# cd /usr/local/kafka_2.12-2.2.1/
      [root@localhost kafka_2.12-2.2.1]# cp config/server.properties config/server-1.properties
      [root@localhost kafka_2.12-2.2.1]# cp config/server.properties config/server-2.properties

修改第二台机子的配置

vi config/server-1.properties
log.dirs=/tmp/kafka-logs-1
listeners=PLAINTEXT://:9093
broker.id=1

![1561198817482](https://raw.githubusercontent.com/hsapphire/picbed/master/1561198817482.png)

修改第三台机子

vi config/server-2.properties
log.dirs=/tmp/kafka-logs-2
listeners=PLAINTEXT://:9094
broker.id=2

![1561198876385](https://raw.githubusercontent.com/hsapphire/picbed/master/1561198876385.png)

1. 启动新模拟的两台服务器

   [root@localhost kafka_2.12-2.2.1]# bin/kafka-server-start.sh config/server-1.properties 
   [2019-06-22 18:23:56,237] INFO Registered kafka:type=kafka.Log4jController MBean (kafka.utils.Log4jControllerRegistration$)

新开连接 继续启动第三台，顺便查看下当前的进程 。发现有两个kafka存在了

[root@localhost ~]# jps
4370 ConsoleProducer
2842 QuorumPeerMain
5642 Jps
3147 Kafka
4955 ConsoleConsumer
5278 Kafka
[root@localhost ~]# cd /usr/local/kafka_2.12-2.2.1/
^C[root@localhost kafka_2.12-2.2.1]# bin/kafka-server-start.sh config/server-2.properties 
[2019-06-22 18:27:31,947] INFO Registered kafka:type=kafka.Log4jController MBean (kafka.utils.Log4jControllerRegistration$)

新开一个连接 ，查看下当前进程 ，三个kafka正常启动了

[root@localhost ~]# jps
4370 ConsoleProducer
6307 Jps
2842 QuorumPeerMain
3147 Kafka
4955 ConsoleConsumer
5948 Kafka
5278 Kafka

1. 创建一个带有备份的topic

   [root@localhost kafka_2.12-2.2.1]# bin/kafka-topics.sh --create --bootstrap-server localhost:9092 --replication-factor 3 --partitions 1 --topic my-replication-topic

2. 查看哪个borke【kafka服务器】在工作

   [root@localhost kafka_2.12-2.2.1]# bin/kafka-topics.sh --describe --bootstrap-server localhost:9092 --topic my-replication-topic
   Topic:my-replication-topic    PartitionCount:1    ReplicationFactor:3    Configs:segment.bytes=1073741824
       Topic: my-replication-topic    Partition: 0    Leader: 1    Replicas: 1,2,0    Isr: 1,2,0

leader:哪个broker在读写

replicas:当前可以正常工作的kafka集群。当leader挂掉时会自动替补

isr:同步消息的列表集合

1. 查看我们之前创建的topic消息

   当时我们只有一个kafka服务器。可以看只leader是0，替被和备份的都是0，

   [root@localhost kafka_2.12-2.2.1]# bin/kafka-topics.sh --describe --bootstrap-server localhost:9092 --topic test
   Topic:test    PartitionCount:1    ReplicationFactor:1    Configs:segment.bytes=1073741824
       Topic: test    Partition: 0    Leader: 0    Replicas: 0    Isr: 0

2. 在新的topic中发布新的消息

   [root@localhost kafka_2.12-2.2.1]# bin/kafka-console-producer.sh --broker-list localhost:9092 --topic my-replication-topic
   >message one
   >message two

3. 消费者去获取消息

   [root@localhost kafka_2.12-2.2.1]# bin/kafka-console-consumer.sh  --bootstrap-server  localhost:9092 --from-beginning --topic my-replication-topic
   message one
   message two

4. 检查当前的leader

   [root@localhost kafka_2.12-2.2.1]# bin/kafka-topics.sh --describe --bootstrap-server localhost:9092 --topic my-replication-topic
   Topic:my-replication-topic    PartitionCount:1    ReplicationFactor:3    Configs:segment.bytes=1073741824
       Topic: my-replication-topic    Partition: 0    Leader: 1    Replicas: 1,2,0    Isr: 1,2,0

5. 模拟leader1挂掉以后的状态

   把leader1关掉

   检查leader1的进程

   ps aux 显示用户当前的所有进程 。并根据grep后面的内容进行搜索

   用kill杀死相关进程

   [root@localhost kafka_2.12-2.2.1]# ps aux | grep server-1.properties
   root       5278  3.5 20.5 3232460 205560 pts/5  Sl+  18:23   1:06 /usr/local/jdk1.8.0_211/bin/java -Xmx1G
   [root@localhost kafka_2.12-2.2.1]# kill -9 5278

6. 再次检查当前topic的消息

   发现leader已经从1变成了2.

   [root@localhost kafka_2.12-2.2.1]# bin/kafka-topics.sh --describe --bootstrap-server localhost:9092 --topic my-replication-topic
   Topic:my-replication-topic    PartitionCount:1    ReplicationFactor:3    Configs:segment.bytes=1073741824
       Topic: my-replication-topic    Partition: 0    Leader: 2    Replicas: 1,2,0    Isr: 2,0

7. 使用kafka connect 导入导出数据

   souce connector 从text.txt读取文件 ，把内容发送到connect-test., sink connector 从conect-test读写消息

   [root@localhost kafka_2.12-2.2.1]# bin/connect-standalone.sh config/connect-standalone.properties config/connect-file-source.properties  config/connect-file-sink.properties 
   [2019-06-22 19:05:55,493] INFO Kafka Connect standalone worker initializing ... (org.apache.kafka.connect.cli.ConnectStandalone:67)

进行jps分发现多了一个ConnectStandalone的进程

[root@localhost ~]# jps
4370 ConsoleProducer
9478 Jps
9160 ConnectStandalone
2842 QuorumPeerMain
3147 Kafka
4955 ConsoleConsumer
5948 Kafka

显示文件内容 

 more 命令类似 cat ，不过会以一页一页的形式显示，更方便使用者逐页阅读，

[root@localhost kafka_2.12-2.2.1]# more test.sink.txt 
foo
bar

使用消费者控制 台显示

[root@localhost kafka_2.12-2.2.1]# bin/kafka-console-consumer.sh --bootstrap-server localhost:9092 --topic connect-test --from-beginning
{"schema":{"type":"string","optional":false},"payload":"foo"}
{"schema":{"type":"string","optional":false},"payload":"bar"}

继续测试 

生产者进行消息追加

[root@localhost kafka_2.12-2.2.1]# echo -e "foo\nbarddddaaa\aaaaa\dddd\1\2\2\3" > test.txt
[root@localhost kafka_2.12-2.2.1]# echo -e "foo\nbarddddaaa\aaaaa\dddd\1\2\2\3\new append" > test.txt

消费者进行实时显示

[root@localhost kafka_2.12-2.2.1]# bin/kafka-console-consumer.sh --bootstrap-server localhost:9092 --topic connect-test --from-beginning
{"schema":{"type":"string","optional":false},"payload":"foo"}
{"schema":{"type":"string","optional":false},"payload":"bar"}
{"schema":{"type":"string","optional":false},"payload":"dddd"}
{"schema":{"type":"string","optional":false},"payload":"aaaaaaad"}
{"schema":{"type":"string","optional":false},"payload":"dd"}
^[[A^[[A^[[B{"schema":{"type":"string","optional":false},"payload":"1\\2\\2\\3"}
{"schema":{"type":"string","optional":false},"payload":"ew append"}